Cam



w. M. EvENsEN.

CAM.

MPLICATION FILED JULYZG, |911- Patenwallveb. 24,1920;

CAM.

APPLICATION FILED IuIY 26, 1917.

vIafllted Feb. 24, 1920.

3` SHEETS-SHEET 2.

W. M. EVENSEN.

GAM.

lsu.

Patented Feb. 24,1920

APPLICATION FILED JULY '26| l e in rapc Vferred to, and constituting a part,

vin a Vdifferent position `figures, whereby the dwell is shortened; and' UNITED srA'rFsrATENr oFFIcF..

WILLIAM M. FvENsEN, oF CHICAGO, ILLINOIS, AssIGNonv 'ro Goss PRINTING PRESS COMPANY, A VCORPORATION orv ILLINOIS. I

CAM, l

specification of Letters Patent. Patented Feb. 24., 1920.

Appneatien filed July 2e, 1917. serial No. 182,830.

To all 'whom it may concern.' j

Be it known that I, WILLIAM M. EVENSEN, a citizen of the United States, residing at Chicago, .county of Cook, andl State of Illinois, have invented'certain new and useful Improvements in Gams, of which the following is a specification. e

The invention relates to printing presses, and more especially to in'king mechanism for rotary and other presses.`

Gbjects and 'advantages of the invention will be set forth in part hereinafter, and in part will be obvious here/from, or may be ascertained through practice with the invention, the same being attained and realized through the means, instrumentalities vand combinations pointed out in the appended claims. l

The invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings' herein rehereof, illustrate one en bodiment of thev invention, and together with the description serve to explain the principles thereof.

Of the drawings: i Figure l is a general elevation, with parts omitted, of an inlring mechanism constructed in accordance with the principles of the invention;

Fig. 2 is a detail side elevation. of the cam, on an enlarged scale; n 'y Fig. 8 is a similar view but showing a different positioning ofthe high and low parts of the cam, to vary its throw;

Fig. 4t is an end elevation, lookingatFig. 2 from the left, and showing the dwell modifying member in inoperative position; p

Fig. 5 is a central longitudinal section on the line 5-5 of Fig. V4; i

Fig. 6 is a central (taken perpendicular to 6-6 of Fig. a;l p

Fig. 7 shows the dwell modifying `device from the preceeding longitudinal section Fig. 5) onthe line Fig. 8 1s -a side elevation looking at Fig. 7 from Vthe left. i

In ra id printing presses, 4and especially lprotary presses, the providing of an f classes -of work,

-and other conditions.

the present invention pro- Y ink supply which is adequate in yquantity and which is uniformly distributed is a very difficult problem in connection with dierent different lkinds of paper, dierent press speeds and kother variations in working materials and conditions.

Among the problems presented is that of securing a proper and always eilicient action of the ductor roller, that is, the roller Vwhich vibrates or travels between the ink fountain roller and the ink drum. Among the problems presented in connection with the ductor .roller istha-t of securingthe properA degree of contact or pressure `between the ductor roller and the fountain roller, and also between the ductor roller and the ink drum, despite changes in the size or condition of theductor roller. l f

The ductor roller is usually made of com? position, and varies `in diameter Vwith age To compensatewfor such variations, vvides for lengthening and shortening the throw or travel ofthe ductor roller at each end of its path oftravel, thereby regulating the degree! of contact of the ductor roller with both the fountain roller and the ink drum and its pressure thereupon. More particularly, the presentiinvention effects such regulationl and modication of the travel of the ductor roller by a very simple,

sub- Y stantial, and practically fool-proof mechanism to provide for changes and modica' tions 1n, and regulations of, the duration of the ldwell of the ductor roller at the ink fountain roller,.and in the present invention,

ysuch means1 is provided in connection with 'the alreadydescribe-dl means for modifying the length of the throw or path of travel 0f the ductor roller. Y l

Referringy to 'the accompanying drawings, illustrating by way of examplaone embodiment ofthe invention, theink fountain is indicated by reference numeral l, and `the ink fountain roller by reference numeral Q. The Vink drum 'is shown at 3, and .in the present embodiment two ink drums Vare ernployed, valthough so far as concerns thepresv'ent invention, this feature of construction. y i

innnaterial. @ne or more rollers4 4 convey the inkfrom the drum 3 to the drum 5, the drum5 being provided with alplurality of vibrating distributing rollers, not shown. The ink is conveyed from thedrum 5 to forni rollers 6 which form rollers ink 'thev plates upon the form cylinder 8.

Reciprocating between the ink fountain roller 2 and the ink drum 3, is the ductor roller 10. The ductor roller v10 has its pintlesniounted in the' upper ends of a pair of arms 11, the ductor roller being removable and replaceable and being held in position by suitable Jmeans, such asv the latches 12. 'l`hearms'11 are carried vupon a shaftf13, transversely disposed and mounted inthe machine frame. The shaft 13 has att-ached thereto an arm 14 provided with a cam roller 15. The cam roller 15 coperates with a cam 16 mounted upon, and rota-ting with, a shaft 17 carried on the machine frame.

v The shaft 17 may also be utilized to drive some of the cylinders and other parts of the inking mechanism, and for this purpose is shown provided with a gear 18 meshing with suitable .driven gears, which are only partially shown, and need not be described in connection with the present invention.

In accordance with certain features of the invention, the means for modifying and regulating the length of the throw of travel of the ductor roller and the means for varying the duration of its dwell at the fountain .roller are both incorporatedin the structure- Vof the Scam 16. Thereby all coml'ilications of levers andlever-arm adjustments in connection between the cam and the ductor Aroller are cbviatcd and dispensed with, leaving the mechanism exceedingly simple and con'lpact, and at the same time providing an unusually nice and reliable adjustment for both functions or purposes.

:Referring more particularly to the embodied form of cam, the camV is provided with a hub 20 :which 'is mounted upon, and fixed to V'rotate with, the shaft 17. Encircling the hub 20 is an annular operating member 21, that'is, the member thereof which controls. and 'determines the motion imparted thereby to the ductor roller. member 21 is provided with a high part 22 and a low part'23, and with intervening sloping parts 24 and 25,v the-motion of the cam -froller occurring during the passage of the cam roller 15 overthe sloping` parts, and the period of dwell of the cam roller at each end of its path of travel being determined by the length of the high part 22 and lower part 23.

` The operating member 21 is movable upon its support to simultaneously vary .the rela-Y tive effective elevation or position of the low and high parts, thereby modifying and regulating the length of throw or travel of the ductorroller. As embodied, the operating member 21 ispivotally mounted on diamey and for controlling its movement, that is, for

'therein a' screw-threaded opening -by'the high part of thel cam is ,rendered The operating trally1 disposed supports. These supports are shown as bolts 26 and 27, each'having` a slotted head countersunk in Y,the.annular'operat-ing member' 21, and having, respectively, shoulders 29 bearing upon the rexteriorsurface of the hub 20, and having a threaded portion 30 screwed into the body of the hub.

Means are provided for swinging the operating' member 21 about its pivotal bearing holding it in any desired position.v In the V embodied form of such means (Figs. 2, 3 and Y 5), a bolt or member 34 has a threaded portion 35, screwed into the hvub'rQOy and having a shouldered head 36'resting on andfprojecting from the hub. VSaid bolt head36` has disposed transversely to the bolt shank35, and thread-V ed thereinto is ascrew orbolt 37 having an adjusting head 38. By turning the bolt 37 the operating member 21 is positionedand held to vary the. throw of the'cam as desired. The bolt 34 and adjusting bolt 3.7 are posi-` tioned in a recess or cut outportion 39 in the annular side wall of the operating member 21, the adjusting head 3S bearing against 'the top wall 40 of the aperture 39 and the lower end of the bolt 37, bea-ring against the bottom wall 41 thereof (Fig. 5).

Thus by turning the head 38, the screw 37 is moved to the right or.lefti11Fig.-5, and :the operating member. 21 is thereby swung about its'pivots 26 and 27, and therehigher and the lower part lower, or,when the screwV 37 is turned in the opposite direction, the high part' of the cam is made lower and the low part higher. Thus the throw of the cam is minutely and nicely regulated, that is, lengthenedor shortened, in the manner described. InpFig. 3 of the drawings, the longest throw vof the cam is shown in yfull lines and the shortest throw of thefcam is shownV in dotted lines while in Fig. 2 of the drawings, the cam isshewn 110 in medianposition with a correspondingvariation in the throw.

I nthe embodied form of dwell. modifying and regulating means, an arcuate plate er member 45 rests against the end or face 115 of the hub 20, having a central aperture 46 encircling the shaft 17. The plate 45 has its exterior periphery preferably dimensionedto nest within the annular' operating member 21. The exterior 'face or flat side 120 of the member 45 is formed at one point in its surfacewith a curved portion 47, which preferably has the same contour as the edge of t-he annulus 21 at the point where the latter begins to slope upwardly from thelow part or low dwell 23. At' f either side' ofthe part 47, the member or disk 45 is substantially flat or level, as shown at 48v and 49, the two level parts being joinedby the'step 50, corresponding 130 to the differences in their height or ythickness and to the rise of the sloping part 47 ln the disk 45 are formed arcuate slots 51 and 52', through which project clampingy 54, which screws or` l bolts are threaded intol the end or faceof screws or bolts 53 and the hub 20,.

Y It will be understood that when the sloping part' i7 of the disk 45 is in line-with that part of the rim of the annulus 21 of like contour therewith, the action ofr .the cam upon the diictor roller is unchanged, the dwell at the ductor roller being for the full period of the low part 23 ofthe cam. If the disk 45 be rotated in the. clockwise direction in Figs. 4 and 8, the rise Lf7 on the cam disk 45 will be movedr outivardly into alinement with a portionfof the low part 23 of the operating member 21, thereby in effectshortening the extension of the low part 28, and thereby causing the ductor roller tomove away from the fountain roller after a shorter'lapse of time than when the cam disk 45 is in the y.

first described position. The` clamping bolts 53 and -tserve to hold the disk 45 in position, being loosened to permit movement of the disk, and being screwed down to hold it in place. y y

The invention in its broaderaspects is not limited to the exact construction'shown and described, nor to the particular form of cam illustrated and described, but changes may be made therefrom within the scope of the appended claims, without departing from the principles of the. invention and without sacrificing its chief advantages.V

VVha-t I claim as my invention and desire to secure by Letters Patent is 1. The combination with a rotatable, longitudinally immovable shaft, of a cam having a hub mounted upon the shaft, and an annular operating member having a high and low part on its rim, a pivotal mounting for said member upon its hub, a threaded member engaging the operating member and the hub to move the operating member about its bearing to change the relative position of the low and high parts of the cam and a modifying member carried on the side face of the hub within theannular operating member and rotatable. on the hub to vary the relative proportions of the low and high parts of the operating member.

2. The combination with a rotatable, longitudinally immovable shaft, of a cam having a hub mounted upon the shaft, an an-` nular operating member having a high and low part on its rim, a pivotal mounting for said member upon its hub, a threaded memcounteri gaging the annular of the member.

member and,y rotatable on the hub to vary part ofthe cam.

3.` The combination with la rotatable, longitudinally immovable shaft, of a cam having a hub mounted upon the shaft, an annular operating member having a high and low part ,on its rim, a pivotal mounting for said memberupon its hub, a-threaded member engaging the operating member and the hub tol move the operating member about its bearing to change the relative position of the low and high ,parts of the cam, a modifying member carried von the side face of the hub within the annular operating. member and rotat ble on the hub, andV a screw and slot connectionY between said modifying member andthe hub tofvary, the relative proportions of the low vand high' parts of the operating member. l 'l l 4t. A cam vhaving a hub mounted on a the `extent of the low vshaft, an annular operating Vmember loosely encircling the hub and havingL a mounting upon` thev hub, and ar threaded device enoperating membery and the hub to move the annular operating member aboutits mounting Ato vary the position of the low and high parts to vary the throw of the cam and a member movable 'to vary a dwell portion of the cam. l

5. A cam having a hub mounted Von aV shaft, an annular operating member loosely encircling the hub and having a mounting upon theV hub, and a threaded device engaging the annular operating'member'and the hub to move the annular operating member about its mounting to vary the position of the low and high parts to vary thevthrow cam anda member movable .to vary the extent of the Vlow portion of the cam.

6. A 'cam having a hub mounted on a shaft and an annular operating member pivotally` mounted on the hub and connections between the operating member and hub for positioning `the operating member and positively holding it in position to vary the throw of the cam, the cam roller path being along the side edge of the annular operating member.

Y 7. A cam having a hub mounted on a shaft and an annular operating member pivotally 115 mounted'on the hub, and a screw, for positioniiig the operating member and for positively Vholding it in position to vary the throw of the cam, the cam roller path being along the side edge of the annular 8.' A cam having a hub mounted on a shaft i and an annular operating member pivotallv ymounted on the hub, and a screw'threaded g in the hub andengaging at both ends with 125 the .operating member for positioning the operating member and for positively holding it in position to vary cam.

, 9. A cam having a hub mounted on a shaft 130 operating 1 20 the throw of the Y i K shaft and an annular operating member pivand an annular operating member havin@ a high and a low part and being diameti'glly pivoted on the hubA and means for position-v lng the operating member` relatively to the Ahub to vary lthe throw and Vfor positively r holdinit in position.

10. cam having a hub mounted on a shaft and an annular operating member f between otally lmounted on thehub and connections the operating member and hub for positioning the operating member and positively holding it in position to vary the `throw ofthe cam, and a dwell modifying Y devicecoperating with the operating member.

12. A cam having a hub' mounted on a shaft and an annular' operating member vpivotally mounted on the hub and connections between the operating member and hub for lpositioning 'the operating member, and a dwell modifying device cooperating with the operating member. v

13. A camV having a hub mounted on aV shaft and an annular operating member. pivotally mounted on Vthe hub and having the cam track on its side edge, and inclinable llotoh ways fromv the perpendicular to the 14.1A cam having a hub mounted on a shaft and an annular operating member pivotally mounted on the hub, and inclinable both ways from the perpendicular to the hub, and means for so inclining .the operating member and for'psitively holding it in posi-tion.

15. A cam havingV a hub mounted on a shaft and an annular operating'member having a high and a low part along the side edge thereof constituting the cam roller track, and being pivoted on the hub and be` 'ing inclinable lbothvways fromy the perpendicular tothe shaft. p I

In testimony whereof I have signed my name to this specification.

' f. WILLIAM M. EVENSEN 

